84 lines
3.1 KiB
Python
84 lines
3.1 KiB
Python
# -*- coding: UTF-8 -*-
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#
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# Copyright (C) 2007 by Jan Dittberner.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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# USA.
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#
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# Version: $Id$
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import ConfigParser, os
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from subprocess import *
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from sqlalchemy import *
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from gnuviechadmin.exceptions import *
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class BackendEntity(object):
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"""This is the abstract base class for all backend entity classes."""
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def __init__(self, verbose = False):
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self.verbose = verbose
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self.config = ConfigParser.ConfigParser()
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self.config.readfp(open('gnuviechadmin/defaults.cfg'))
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self.config.read(['gnuviechadmin/gva.cfg',
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os.path.expanduser('~/.gva.cfg')])
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def __repr__(self):
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if self.verbose:
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cols = [col for col in \
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object_mapper(self).local_table.columns.keys()]
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format = "%(class)s:"
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format = format + ", ".join([col + "=%(" + col + ")s" for col in \
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cols])
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data = {'class' : self.__class__.__name__}
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else:
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cols = self._shortkeys
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format = ",".join("%(" + col + ")s" for col in cols)
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data = {}
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data.update(dict([(col, self.__getattribute__(col)) for col in cols]))
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return format % data
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def sucommand(self, cmdline, pipedata = None):
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"""Executes a command as root using the configured suwrapper
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command. If a pipe is specified it is used as stdin of the
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subprocess."""
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suwrapper = self.config.get('common', 'suwrapper')
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toexec = "%s %s" % (suwrapper, cmdline)
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if pipedata:
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p = Popen(toexec, shell = True, stdin=PIPE)
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pipe = p.stdin
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print >>pipe, pipedata
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pipe.close()
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sts = os.waitpid(p.pid, 0)
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if self.verbose:
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print "%s|%s: %d" % (pipedata, toexec, sts[1])
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else:
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p = Popen(toexec, shell = True)
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sts = os.waitpid(p.pid, 0)
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if self.verbose:
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print "%s: %s" % (toexec, sts[1])
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return sts[1]
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def validate(self):
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"""Validates whether all mandatory fields of the entity have
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values."""
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missingfields = []
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for key in [col.name for col in \
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object_mapper(self).local_table.columns \
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if not col.primary_key and not col.nullable]:
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if self.__getattribute__(key) is None:
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missingfields.append(key)
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if missingfields:
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raise MissingFieldsError(missingfields)
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